Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Sensors The sensor fell off and I don't know which wire goes where????The wires are white ,yellow,and red.On the sensor itself it has a screw that says white but the yellow wire was connected to that one. The other wire was broken and I don't know what color goes on that screw marked black .Would it be the Yellow wire OR red wire. Please help Thank you

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I think someone has used wiring that didn't come with the opener. One the rear of the motor unit are wiring terminals. The sensors connect to terminals 2 and 3. Whichever color wire is connected to terminal 2 goes to the screw marked white and the wire on terminal 3 goes to the screw marked black. This information is if you have a Craftsman or Chamberlain opener.

Posted on Sep 02, 2009

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